Anatomical imaging system with scanning table movable along the X-axis and/or scanning table movable along the Y-axis and the Z-axis

ABSTRACT

A novel scanning table for use with a scanning machine, the novel scanning table being movable along the X-axis and/or movable along the Y-axis and the Z-axis.

REFERENCE TO PENDING PRIOR PATENT APPLICATIONS

This patent application:

(i) claims benefit of prior U.S. Provisional Patent Application Ser. No.62/036,774, filed Aug. 13, 2014 by Neurologica Corp. and Eric Bailey etal. for ANATOMICAL IMAGING SYSTEM WITH SCANNING TABLE MOVABLE ALONG THEX-AXIS; and

(ii) claims benefit of prior U.S. Provisional Patent Application Ser.No. 62/036,787, filed Aug. 13, 2014 by Neurologica Corp. and Eric Baileyet al. for ANATOMICAL IMAGING SYSTEM WITH SCANNING TABLE MOVABLE ALONGTHE Y-AXIS AND THE Z-AXIS.

The two (2) above-identified patent applications are hereby incorporatedherein by reference.

FIELD OF THE INVENTION

This invention relates to imaging systems in general, and moreparticularly to anatomical imaging systems.

BACKGROUND OF THE INVENTION

In many situations it can be desirable to image the interior of opaqueobjects. By way of example but not limitation, in the medical field, itcan be desirable to image the interior of a patient's body so as toallow viewing of internal structures without physically penetrating theskin.

Computerized Tomography (CT) has emerged as a key imaging modality inthe medical field. CT imaging systems generally operate by directingX-rays into the body from a variety of positions, detecting the X-rayspassing through the body, and then processing the detected X-rays so asto build a three-dimensional (3D) data set and a 3D computer model ofthe patient's anatomy. The 3D data set and 3D computer model can then bevisualized so as to provide images (e.g., slice images, 3D computerimages, etc.) of the patient's anatomy.

By way of example but not limitation, and looking now at FIGS. 1 and 2,there is shown an exemplary CT imaging system 5. CT imaging system 5generally comprises a torus 10 which is supported by a base 15. A centeropening 20 is formed in torus 10. Center opening 20 receives the patientanatomy which is to be scanned.

Looking next at FIG. 3, torus 10 generally comprises a fixed gantry 22,a rotating disc 23, an X-ray tube assembly 25 and an X-ray detectorassembly 30. More particularly, fixed gantry 22 is disposedconcentrically about center opening 20. Rotating disc 23 is rotatablymounted to fixed gantry 22. X-ray tube assembly 25 and X-ray detectorassembly 30 are mounted to rotating disc 23 in diametrically-opposingrelation, such that an X-ray beam 40 (generated by X-ray tube assembly25 and detected by X-ray detector assembly 30) is passed through thepatient anatomy disposed in center opening 20. Inasmuch as X-ray tubeassembly 25 and X-ray detector assembly 30 are mounted on rotating disc23 so that they are rotated concentrically about center opening 20,X-ray beam 40 will be passed through the patient's anatomy along a fullrange of radial positions, so as to enable CT imaging system 5 to createa “slice” image of the anatomy penetrated by the X-ray beam.Furthermore, by moving the patient and CT imaging system 5 relative toone another during scanning, a series of slice images can be acquired,and thereafter appropriately processed, so as to create a 3D data set ofthe scanned anatomy and a 3D computer model of the scanned anatomy. Inpractice, it is common to configure X-ray detector assembly 30 so thatmultiple slices of images (e.g., 8 slices, 16 slices, 32 slices, etc.)may be acquired with each rotation of rotating disc 23, whereby to speedup the acquisition of scan data.

In practice, it is now common to effect helical scanning of thepatient's anatomy so as to generate a 3D data set of the scannedanatomy, which can then be processed to build a 3D computer model of thescanned anatomy. The 3D data set and 3D computer model can then bevisualized so as to provide images (e.g., slice images, 3D computerimages, etc.) of the patient's anatomy.

The various electronic hardware and software for controlling theoperation of rotating disc 23, X-ray tube assembly 25 and X-ray detectorassembly 30, as well as for processing the acquired scan data so as togenerate the desired slice images, 3D data set and 3D computer model,may be of the sort well known in the art and may be located in torus 10and/or base 15.

In many cases CT imaging system 5 is intended to be stationary, in whichcase base 15 of CT imaging system 5 is set in a fixed position on thefloor of a room and a special motorized scanning table is provided tomove the patient relative to CT imaging system 5 during scanning. Moreparticularly, with a stationary CT imaging system 5, the patient isbrought to the location of CT imaging system 5, the patient is placed onthe motorized scanning table, and then the motorized scanning table isused to move the patient relative to CT imaging system 5 (i.e., toadvance the patient into center opening 20 of CT imaging system 5) sothat some or all of the length of the patient may be scanned by CTimaging system 5.

In other cases CT imaging system 5 is intended to be mobile so that theCT imaging system may be brought to the patient and the patient scannedat the patient's current location, rather than requiring that thepatient be transported to the location of the CT imaging system.Scanning the patient with a mobile CT imaging system 5 can be highlyadvantageous, since it can reduce delays in patient scanning (e.g., thepatient can be scanned in an emergency room rather than waiting to betransported to the radiology department) and/or it can allow the patientto be scanned without requiring movement of the patient (e.g., thepatient can be scanned at their bedside in an intensive care unit,“ICU”). To this end, and looking now at FIGS. 4 and 5, base 15 maycomprise a transport assembly 50 for (i) moving mobile CT imaging system5 to the patient prior to scanning and (ii) moving the CT imaging systemrelative to the patient during scanning. More particularly, transportassembly 50 preferably comprises (i) a gross movement mechanism 55 formoving CT imaging system 5 relatively quickly across room distances, sothat the CT imaging system can be quickly and easily brought to thebedside of the patient, such that the patient can be scanned at theirbedside without needing to be moved to a radiology department, and (ii)a fine movement mechanism 60 for moving the CT imaging system precisely,relative to the patient, during scanning so that the patient can bescanned on their bed or gurney without needing to be moved onto aspecial motorized scanning table. In one preferred form of theinvention, gross movement mechanism 55 preferably comprises a pluralityof free-rolling casters 62, and fine movement mechanism 60 preferablycomprises a plurality of centipede belt drives 63 (which can beconfigured for either stepped or continuous motion, whereby to provideeither stepped or continuous scanning of the patient). Hydraulicapparatus 65 permits either gross movement mechanism 55 or fine movementmechanism 60 to be engaged with the floor, whereby to facilitateappropriate movement of mobile CT imaging system 5. Thus, with a mobileCT imaging system 5, the CT mobile imaging system may be pre-positionedin an “out of the way” location (e.g., in an unused corner of anemergency room) and then, when a patient requires scanning, the patientmay be quickly and easily scanned at their bedside, by simply moving themobile CT imaging system to the patient's bedside on gross movementmechanism 55 (e.g., casters 62), and thereafter moving the mobile CTimaging system during scanning on fine movement mechanism 60 (e.g.,centipede belt drives 63).

Adjusting the Disposition of the Patient Relative to the LongitudinalAxis of the Center Opening in the Torus

It has also been recognized that, in some circumstances, it cansometimes be desirable to adjust the disposition of the patient relativeto the longitudinal axis of center opening 20 in torus 10.

(For the purposes of the following discussion, it can be helpful toidentify the various axes associated with CT imaging system 5 and thescanning table—to this end, the “X-axis” will be considered to be theaxis extending parallel to the floor, the “Y-axis” will be considered tobe the axis extending perpendicular to the floor, and the “Z-axis” willbe considered to be the axis extending parallel to the longitudinal axisof center opening 20 of torus 10, see FIG. 1).

More particularly, and looking now at FIGS. 6-8, a patient P isgenerally positioned on the scanning table T so that the longitudinalaxis A_(P) of the patient's body is aligned with the longitudinal axisA_(T) of the scanning table, which is in turn aligned with thelongitudinal axis A_(C) of center opening 20 (FIG. 6). The patient'sbody is then advanced (i.e., along the Z-axis) into center opening 20,i.e., by advancing the patient support platform of scanning table T intocenter opening 20. However, in some cases, the longitudinal axis A_(P)of the patient's body may not be aligned with the longitudinal axisA_(T) of the scanning table (FIG. 7), and hence the patient may need tobe repositioned on the scanning table so that they are aligned with thelongitudinal axis A_(C) of center opening 20. Or the patient may becentered on the scanning table, but the anatomy A which is to be scannedmay not be aligned with the longitudinal axis A_(C) of center opening 20(FIG. 8), e.g., because the longitudinal axis A_(A) of the anatomy Awhich is to be scanned is disposed off-center from the longitudinal axisA_(P) of the patient's body. Because the scanning table is typicallymounted to a fixed base, and comprises a patient support platformadapted to move in only the Z-direction, in both of the foregoingsituations (i.e., the situations of FIGS. 7 and 8), it may be necessaryto reposition the patient relative to center opening 20 of CT imagingsystem 5 by moving the patient on the scanning table (i.e., by movingthe patient to the left or right on the patient support platform of thescanning table). However, repositioning the patient on the scanningtable is not always possible or desirable. For example, if the patientis unconscious or physically handicapped or elderly, it may be difficultto reposition the patient on the scanning table. Also, the patientsupport platform of the scanning table is typically fairly narrow,thereby limiting the extent to which a patient may be repositioned onthe scanning table.

Thus there is a need for a way to move the patient's body along theX-axis relative to the longitudinal axis of center opening 20 of torus10 in a precise and controlled manner which does not requirerepositioning the patient's body on the scanning table.

Minimizing the Length of the Motorized Scanning Table that is Used toScan a Patient

It has also been recognized that it can be desirable to minimize thelength of the motorized scanning table that is used to scan a patientusing CT imaging system 5.

(Again, for the purposes of the following discussion, it can be helpfulto identify the various axes associated with CT imaging system 5 and themotorized scanning table—to this end, the “X-axis” will be considered tobe the axis extending parallel to the floor, the “Y-axis” will beconsidered to be the axis extending perpendicular to the floor, and the“Z-axis” will be considered to be the axis extending parallel to thelongitudinal axis of center opening 20 of torus 10, see FIG. 1).

More particularly, motorized scanning tables are typically quite long,inasmuch as the scanning table must be long enough to accommodate thebody of the patient and must be able to extend along the Z-axis for asufficient distance to advance the anatomy into (and through) centeropening 20 of CT imaging system 5. Thus, the patient support platform ofthe motorized scanning table is typically cantilevered a substantialdistance out from the base of the motorized scanning table while thepatient is being scanned.

In addition to the foregoing, it has been recognized that it isgenerally necessary to provide a gap between the end of the motorizedscanning table and CT imaging system 5 (e.g., so as to provide room forpersonnel to access and service the components of CT imaging system 5when necessary), thereby further increasing the overall length of thepatient support platform of the motorized scanning table.

By way of example but not limitation, and looking now at FIGS. 9 and 10,there is shown a motorized scanning table S which comprises a fixed baseF and a patient support platform L which is movable in the Z-axisrelative to fixed base F, whereby to advance the anatomy which is to bescanned through the scanner. As noted above, a minimum distance M mustbe maintained when patient support platform L of motorized scanningtable S is in its fully retracted configuration, and patient supportplatform L must be long enough to advance all of the anatomy which is tobe scanned through the scanner. Thus, patient support platform L must belong enough to accommodate the length of the patient and to advance thelength of the patient over the distance M and the distance B in order topermit complete scanning of the patient.

For these reasons, patient support platform L of motorized scanningtable S must typically be quite long, and it must cantilever asubstantial distance out from fixed base F of motorized scanning tableS. However, it is also very important that motorized scanning table Sprovide a stable support for the patient, even when patient supportplatform L is cantilevered out a significant distance away from fixedbase F of motorized scanning table S, in order to permit proper imagingof the patient. And this must be accomplished even when dealing withheavy-set patients who impose a substantial load on the cantileveredpatient support platform L.

In practice, several different types of motorized scanning tables exist.

One type of motorized scanning table is the motorized scanning table Sshown in FIGS. 9 and 10, which utilize a fixed base F and a patientsupport platform L that can move along the Z-axis relative to fixed baseF. However, with this type of motorized scanning table, because fixedbase F does not move along the Y-axis (i.e., up and down), it can bechallenging for some patients (e.g., elderly patients, obese patients,etc.) to get on or off the motorized scanning table.

To address this problem, and looking now at FIGS. 11 and 12, mostmotorized scanning tables utilize a so-called “scissor” lift mechanismto raise and lower patient support platform L. More particularly, inthis form of motorized scanning table, motorized scanning table Scomprises fixed base F, a table top N and patient support platform L. A“scissor” lift mechanism Q is used to move table top N along the Y-axisrelative to fixed base F, and a transport mechanism (not shown) is usedto move patient support platform L along the Z-axis relative to tabletop N. Scissor lift mechanism Q generally comprises two scissor pairs,one on each side of fixed base F, where each scissor pair itselfcomprises a pair of crossed arms, with one end of each arm beingpivotally connected to either fixed base F or table top N, and with theother end of each arm being slidably connected to the other of fixedbase F or table top N, and with the pair of crossed arms being pivotallyconnected to each other intermediate their length (FIG. 11). By virtueof this construction, table top N of scanning table S can move along theY-axis relative to fixed base F so as to permit the motorized scanningtable to be raised and lowered, e.g., table top N of motorized scanningtable S can be lowered to help a patient get onto the patient supportplatform L of the motorized scanning table, and then table top N ofmotorized scanning table S can be raised so that the patient is at theproper level for scanning. During scanning, patient support platform Lcan be moved along the Z-axis relative to table top N for advancing thepatient into center opening 20 of CT imaging system 5.

Note that with the “scissor lift” motorized scanning table S of FIGS. 11and 12, the distance that patient support platform L must becantilevered out over fixed base F of the motorized scanning tableremains the same as with the fixed-height motorized scanning table ofFIGS. 9 and 10, regardless of the position of table top N along theY-axis.

However, as noted above, because patient support platform L of motorizedscanning table S is cantilevered out over fixed base F of motorizedscanning table S and must support significant weight (i.e., the weightof the patient disposed on the cantilevered patient support platform L),it has been recognized that it is desirable to minimize the distancewhich patient support platform L must be cantilevered out over fixedbase F of the motorized scanning table during scanning.

To this end, another type of scanning table (sometimes referred to asthe so-called “cobra” style motorized scanning table) has beendeveloped. More particularly, and looking now at FIGS. 13 and 14, withthe “cobra” style motorized scanning table, motorized scanning table Sstill comprises fixed base F, table top N and patient support platformL. However, with the “cobra” style scanning table, a pair of parallelarms are pivotally mounted to fixed base F of motorized scanning table Sand pivotally mounted to table top N, thereby enabling table top N tomove through an arc about fixed base F of motorized scanning table S(FIG. 14), whereby to simultaneously move table top N along both theY-axis and the Z-axis. Because table top N moves along the Y-axis (e.g.,by the distance C shown in FIG. 14), the overall length of patientsupport platform L can be reduced by the distance C, thereby reducingthe distance that patient support platform L must be cantilevered outover fixed base F. Unfortunately, however, the “cobra” style scanningtable lacks stability because its parallel arms do not reinforce oneanother (unlike the “scissor lift” style motorized table of FIGS. 11 and12, where the crossed arms of the scissor lift mechanism are connectedtogether intermediate their length and thereby reinforce each other).

Thus there is a need for a new and improved motorized scanning tablewhich is configured to move along the Y-axis (i.e., up and down) whilealso moving along the Z-axis, whereby to reduce the distance that thepatient support platform must be cantilevered out over the fixed base ofthe motorized scanning table, while providing increased stability.

SUMMARY OF THE INVENTION

These and other objects of the present invention are addressed by theprovision and use of a novel scanning table, wherein the portion of thetable which supports the patient can be moved along the X-axis, wherebyto move the patient's body relative to the longitudinal axis of centeropening 20 in a precise and controlled manner which does not requirerepositioning the patient's body on the scanning table.

Thus the present invention provides a novel scanning table which allowsa patient that is positioned off-center of the longitudinal axis of thescanning table to be moved along the X-axis so as to align the patientwith the longitudinal axis of center opening 20 (FIG. 15). The presentinvention also allows a patient to be moved along the X-axis so as toalign particular anatomy with the longitudinal axis of center opening 20(FIG. 16).

The present invention also comprises the provision and use of a new andimproved motorized scanning table which is configured to move along theY-axis (i.e., up and down) while also moving along the Z-axis, wherebyto reduce the distance that the patient support platform must becantilevered out over the fixed base of the motorized scanning table,while providing increased stability.

In one preferred form of the invention, there is provided a novelscanning table for use with a scanning machine, the novel scanning tablecomprising:

-   -   a fixed base;    -   a movable table top movably mounted to the fixed base for        permitting the movable table top to be moved along the X-axis        relative to the fixed base; and    -   a movable patient support platform movably mounted to the        movable table top for permitting the movable patient support        platform to be moved along the Z-axis relative to the movable        table top.

In another preferred form of the invention, there is provided a systemcomprising:

-   -   an imaging system; and    -   a scanning table comprising:        -   a fixed base;        -   a movable table top movably mounted to the fixed base for            permitting the movable table top to be moved along the            X-axis relative to the fixed base; and        -   a movable patient support platform movably mounted to the            movable table top for permitting the movable patient support            platform to be moved along the Z-axis relative to the            movable table top.

In another preferred form of the invention, there is provided a methodfor scanning a patient, the method comprising:

-   -   providing an imaging system and providing a scanning table, the        scanning table comprising:        -   a fixed base;        -   a movable table top movably mounted to the fixed base for            permitting the movable table top to be moved along the            X-axis relative to the fixed base; and        -   a movable patient support platform movably mounted to the            movable table top for permitting the movable patient support            platform to be moved along the Z-axis relative to the            movable table top;    -   positioning the patient on the movable patient support platform;    -   moving the movable table top relative to the fixed base so as to        adjust the disposition of the patient relative to the imaging        system; and    -   moving the movable patient support platform while using the        imaging system to scan the patient.

In another preferred form of the invention, there is provided a novelmotorized scanning table for use with a scanning machine, the novelmotorized scanning table comprising:

-   -   a fixed base;    -   a movable table top movably mounted to the fixed base for        permitting the movable table top to be simultaneously moved        along the Y-axis and the Z-axis relative to the fixed base,        wherein the movable table top is movably mounted to the fixed        base by a scissor mount comprising two scissor pairs, each        scissor pair comprising a pair of support arms connected to one        another intermediate their length by a pivot mount, and further        wherein one support arm from each pair of support arms is        slidably mounted to the fixed base at one end of the support arm        and is slidably mounted to the movable table top at the other        end of the support arm, and the other support arm from each pair        of support arms is pivotally mounted to the fixed base at one        end of the support arm and is pivotally mounted to the movable        table top at the other end of the support arm; and    -   a movable patient support platform movably mounted to the        movable table top for permitting the movable patient support        platform to be moved along the Z-axis relative to the movable        table top.

In another preferred form of the invention, there is provided a systemcomprising:

-   -   an imaging system; and    -   a motorized scanning table comprising:        -   a fixed base;        -   a movable table top movably mounted to the fixed base for            permitting the movable table top to be simultaneously moved            along the Y-axis and the Z-axis relative to the fixed base,            wherein the movable table top is movably mounted to the            fixed base by a scissor mount comprising two scissor pairs,            each scissor pair comprising a pair of support arms            connected to one another intermediate their length by a            pivot mount, and further wherein one support arm from each            pair of support arms is slidably mounted to the fixed base            at one end of the support arm and is slidably mounted to the            movable table top at the other end of the support arm, and            the other support arm from each pair of support arms is            pivotally mounted to the fixed base at one end of the            support arm and is pivotally mounted to the movable table            top at the other end of the support arm; and        -   a movable patient support platform movably mounted to the            movable table top for permitting the movable patient support            platform to be moved along the Z-axis relative to the            movable table top.

In another preferred form of the invention, there is provided a methodfor scanning a patient, the method comprising:

-   -   providing an imaging system and providing a motorized scanning        table, the motorized scanning table comprising:        -   a fixed base;        -   a movable table top movably mounted to the fixed base for            permitting the movable table top to be simultaneously moved            along the Y-axis and the Z-axis relative to the fixed base,            wherein the movable table top is movably mounted to the            fixed base by a scissor mount comprising two scissor pairs,            each scissor pair comprising a pair of support arms            connected to one another intermediate their length by a            pivot mount, and further wherein one support arm from each            pair of support arms is slidably mounted to the fixed base            at one end of the support arm and is slidably mounted to the            movable table top at the other end of the support arm, and            the other support arm from each pair of support arms is            pivotally mounted to the fixed base at one end of the            support arm and is pivotally mounted to the movable table            top at the other end of the support arm; and        -   a movable patient support platform movably mounted to the            movable table top for permitting the movable patient support            platform to be moved along the Z-axis relative to the            movable table top;    -   positioning the patient on the movable patient support platform;    -   moving the movable table top relative to the fixed base so as to        adjust the disposition of the patient relative to the imaging        system; and    -   moving the movable patient support platform while using the        imaging system to scan the patient.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other objects and features of the present invention will bemore fully disclosed or rendered obvious by the following detaileddescription of the preferred embodiments of the invention, which is tobe considered together with the accompanying drawings wherein likenumbers refer to like parts and further wherein:

FIGS. 1 and 2 are schematic views showing the exterior of an exemplaryCT imaging system;

FIG. 3 is a schematic view showing various components in the torus ofthe exemplary CT imaging system shown in FIGS. 1 and 2;

FIGS. 4 and 5 are schematic views showing an exemplary transportassembly for an exemplary CT imaging system;

FIG. 6 is a schematic view showing how a patient centered on a scanningtable will be aligned with the longitudinal axis of the CT imagingsystem;

FIG. 7 is a schematic view showing how a patient not centered on thescanning table will not be aligned with the longitudinal axis of the CTimaging system;

FIG. 8 is a schematic view showing that even when a patient may becentered on the scanning table, anatomy of interest may not be alignedwith the longitudinal axis of the CT imaging system;

FIGS. 9-14 are schematic views illustrating several exemplary prior artmotorized scanning tables;

FIGS. 15 and 16 are schematic views illustrating how a patient and/oranatomy may be aligned with the longitudinal axis of the CT imagingsystem by moving the scanning table along the X-axis;

FIGS. 17-19 are schematic views showing a novel scanning table formed inaccordance with the present invention, wherein the novel scanning tablecomprises a table top which is movable along the X-axis;

FIGS. 20-26 are schematic views showing construction details of thenovel scanning table of FIGS. 17-19;

FIGS. 27-29 are schematic views showing another novel motorized scanningtable formed in accordance with the present invention;

FIGS. 30-34 are schematic views showing how the novel motorized scanningtable of FIGS. 27-29 is configured to move simultaneously along both theY-axis and the Z-axis; and

FIGS. 35-37 are schematic views showing movement of the table top of themotorized scanning table relative to the fixed base of the motorizedscanning table along both the Y-axis and the Z-axis, and movement of thepatient support platform of the motorized scanning table along theZ-axis.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Adjusting theDisposition of the Patient Relative to the Longitudinal Axis of theCenter Opening in the Torus

In accordance with the present invention, there is provided a novelscanning table, wherein the portion of the table which supports thepatient can be moved along the X-axis, whereby to move the patient'sbody relative to the longitudinal axis of center opening 20 in a preciseand controlled manner which does not require repositioning the patient'sbody on the scanning table.

Thus the present invention provides a novel scanning table which allowsa patient that is positioned off-center of the longitudinal axis of thescanning table to be moved along the X-axis so as to align the patientwith the longitudinal axis of center opening 20 (FIG. 15). The presentinvention also allows a patient to be moved along the X-axis so as toalign particular anatomy with the longitudinal axis of center opening 20(FIG. 16).

More particularly, and looking now at FIGS. 17-19, there is shown anovel scanning table 105. Scanning table 105 comprises a base 110 and atable top 115 slidably mounted to base 110, whereby to permittranslation of table top 115 along the X-axis relative to base 110 (andhence relative to the longitudinal axis A_(C) of center opening 20), aswill hereinafter be discussed. A patient support platform 120 isslidably mounted to table top 115, whereby to permit translation ofpatient support platform 120 along the Z-axis relative to table top 115(i.e., in order to advance/retract the patient into/out of centeropening 20 of CT imaging system 5). Patient support platform 120 isformed out of an X-ray-transparent material so as to not impede imagingof the patient, and is moved relative to table top 115 in ways wellknown in the art.

Looking next at FIGS. 20-26, base 110 preferably comprises a base plate125 mounted to the upper portion of base 110. Table top 115 comprises atable top plate 130 mounted to the bottom portion of table top 115.Table top plate 130 is configured to move along the X-axis relative tobase plate 125. In one preferred form of the present invention, at leastone linear guide 135 is disposed between base plate 125 and table topplate 130 for the purpose of facilitating movement of table top plate130 relative to base plate 125. In one preferred form of the presentinvention, each linear guide 135 comprises a rail 140 fixedly mounted tobase plate 125 and a pair of followers 145 which slidably ride on rail140 and are mounted to table top plate 130. By virtue of thisconstruction, table top plate 130 (and hence table top 115) can movealong the X-axis relative to base plate 125 (and hence relative to base110) when follower 145 slides along rail 140.

In one preferred form of the present invention, movement of table topplate 130 is effected through the use of an X-axis movement mechanism150. More particularly, in one preferred form of the present invention,X-axis movement mechanism 150 comprises a drive belt 155 which isdisposed perpendicular to the long axis (i.e., the Z-axis) of scanningtable 105 and a motor 160 for turning drive belt 155. A bracket 165 ismounted to drive belt 155 such that when motor 160 is rotated in a firstdirection, bracket 165 moves relative to base plate 125 in a firstdirection along the X-axis, and when motor 160 is rotated in a second,opposite direction, bracket 165 moves relative to base plate 125 in asecond, opposite direction along the X-axis. Bracket 165 is in turnmounted to table top plate 130 such that movement of drive belt 155causes table top plate 130 (and hence table top 115) to move relative tobase 110. In one preferred form of the present invention, table topplate 130 comprises an opening 170 and bracket 165 extends throughopening 170 and is mounted to table top plate 130.

In use, when it is desired to move the patient (or the anatomy which isto be scanned) along the X-axis relative to center opening 20 of CTimaging system 5, X-axis movement mechanism 150 is operated so as toadjust the X-axis position of table top 115 relative to base 110 (andhence to adjust the X-axis disposition of the patient/anatomy relativeto center opening 20). Scanning may then be effected by advancingpatient support platform 120 along the Z-axis relative to base 110,whereby to insert the patient/anatomy into center opening 20 and therebyscan the patient/anatomy.

Minimizing the Length of the Motorized Scanning Table that is Used toScan a Patient

In accordance with the present invention, there is also provided a newand improved motorized scanning table which is configured to move alongthe Y-axis (i.e., up and down) while also moving along the Z-axis,whereby to reduce the distance that the patient support platform must becantilevered out over the fixed base of the motorized scanning table,while providing increased stability.

More particularly, and looking now at FIGS. 27-29, there is shown anovel motorized scanning table 205. Motorized scanning table 205comprises a fixed base 210 and a table top 215 movably mounted to fixedbase 210 so as to permit movement of table top 215 along the Y-axis andthe Z-axis relative to fixed base 210, as will hereinafter be discussed.A patient support platform 220 is slidably mounted to table top 215,whereby to permit movement of patient support platform 220 along theZ-axis relative to fixed base 210 (i.e., to advance/retract the patientinto/out of central opening 20 of CT imaging system 5). Patient supportplatform 220 is formed out of an X-ray-transparent material so as to notimpede imaging of the patient, and is moved relative to table top 215 inways well known in the art.

A novel scissor mount 230 is disposed between fixed base 210 and tabletop 215 in order to move table top 215 in the Y-axis and Z-axis relativeto fixed base 210, as will hereinafter be discussed. Scissor mount 230preferably comprises two scissor pairs 235R, 235L, one on each side offixed base 210. Scissor pairs 235R, 235L comprise a pair of support arms240R, 245R, and 240L, 245L, respectively.

Support arms 240R, 245R are connected to one another intermediate theirlength by a pivot mount 250R, and support arms 240L, 245L are connectedtogether intermediate their length by a pivot mount 250L.

Support arms 240R and 240L are slidably mounted at one end to fixed base210 by means of linear guides 255R, 255L, respectively, and are slidablymounted to table top 215 at their opposite ends by means of linearguides 260R, 260L, respectively. In one preferred form of the invention,linear guides 255R, 255L comprise rails 256 mounted to fixed base 210and followers 257 mounted to support arms 240R, 240L, respectively, andlinear guides 260R, 260L comprise rails 258 mounted to table top 215 andfollowers 259 mounted to support arms 240R, 240L, respectively. Supportarms 245R and 245L are pivotally mounted to fixed base 210 via pivotmounts 265R, 265L, respectively, and pivotally mounted to table top 215at their opposite ends via pivot mounts 270R, 270L, respectively.

A linear actuator 275 is disposed between fixed base 210 and table top215. More particularly, the housing 276 of linear actuator 275 ispivotally mounted to fixed base 210 and the actuating rod 277 of linearactuator 275 is pivotally mounted to table top 215.

As a result of the forgoing construction, and looking now at FIGS.30-34, table top 215 can be disposed close to fixed base 210 (FIG. 30)and then linear actuator 275 can be used to simultaneously move tabletop 215 along the Y-axis (i.e., to lift table top 215) whilesimultaneously moving table top 215 along the Z-axis (i.e., to advancetable top 215 toward the scanner). See FIG. 31. More particularly, asthe actuator rod 277 of linear actuator 275 is extended out of housing276 of linear actuator 275, actuator rod 277 applies a force to tabletop 215, whereby to cause support arms 240R and 240L to slide alonglinear guides 255R, 255L relative to fixed base 225 in one direction andto slide along linear guides 260R, 260L relative to table top 215 in theopposite direction (FIGS. 32 and 33). As a result of this slidingmovement of support arms 240R and 240L, table top 215 moves upward alongthe Y-axis and forward (i.e., toward the center opening 20 of CT imagingsystem 5) along the Z-axis. Thus it will be seen that as table top 215is raised along the Y-axis, it is simultaneously moved along the Z-axistoward center opening 20 by a distance D (FIG. 34), thereby reducing thedistance that patient support platform 220 must be cantilevered out overfixed base 210, and hence reducing the overall length required forpatient support platform 220. At the same time, since support arms 240R,245R are connected to one another intermediate their length via pivotmount 250R, and support arms 240L, 245L are connected togetherintermediate their length by pivot mount 250L, support arms 240R, 240Lreinforce one another, thereby providing improved stability to motorizedscanning table 205.

FIGS. 35-37 show how table top 215 can be simultaneously moved in theY-axis and Z-axis relative to fixed base 210 by using improved scissormount 230, and how patient support platform 220 can be extended alongthe Z-axis relative to table top 215.

Application to Other Types of Scanning Systems

It should be appreciated that the present invention is not limited touse in medical applications or, indeed, to use with CT machines. Thus,for example, the present invention may be used in connection with CTmachines used for non-medical applications, e.g., with CT machines usedto scan inanimate objects. Furthermore, the present invention may beused with non-CT-type scanning systems. Thus, for example, the presentinvention may be used in conjunction with SPECT machines, MRI machines,PET machines, X-ray machines, etc., i.e., wherever the scanning machinerequires adjustment of the disposition of the object to be scannedrelative to the scanning machine.

Modifications

It will be appreciated that still further embodiments of the presentinvention will be apparent to those skilled in the art in view of thepresent disclosure. It is to be understood that the present invention isby no means limited to the particular constructions herein disclosedand/or shown in the drawings, but also comprises any modifications orequivalents within the scope of the invention.

What is claimed is:
 1. A novel motorized scanning table for use with a scanning machine, the novel motorized scanning table comprising: a fixed base; a movable table top comprising a first end, a second end and a longitudinal axis extending from the first end to the second end, the movable table top being movably mounted to the fixed base for permitting the movable table top to be simultaneously moved vertically along a Y-axis and horizontally along a Z-axis relative to the fixed base, wherein the Y-axis extends perpendicular to the longitudinal axis of the movable table top and the Z-axis extends parallel to the longitudinal axis of the movable table top, wherein the movable table top is movably mounted to the fixed base by a scissor mount comprising two scissor pairs, each scissor pair comprising a pair of support arms connected to one another intermediate their length by a pivot mount, and further wherein one support arm from each pair of support arms is slidably mounted to the fixed base at one end of the support arm and is slidably mounted to the movable table top at the other end of the support arm, and the other support arm from each pair of support arms is pivotally mounted to the fixed base at one end of the support arm and is pivotally mounted to the movable table top at the other end of the support arm; and a movable patient support platform movably mounted to the movable table top for permitting the movable patient support platform to be moved horizontally along the Z-axis relative to the movable table top.
 2. A novel scanning table according to claim 1 wherein one support arm from each pair of support arms is slidably mounted to the fixed base at one end of the support arm via a first linear guide which is disposed between that support arm and the fixed base, and is slidably mounted to the movable table top at the other end of that support arm via a second linear guide which is disposed between that support arm and the movable table top.
 3. A novel scanning table according to claim 2 wherein the first linear guide comprises a rail secured to the fixed base and at least one follower which slidably rides on the rail and is secured to the support arm.
 4. A novel scanning table according to claim 2 wherein the second linear guide comprises a rail secured to the movable table top and at least one follower which slidably rides on the rail and is secured to the support arm.
 5. A novel scanning table according to claim 1 further comprising an actuator for moving the movable table top relative to the fixed base.
 6. A novel scanning table according to claim 5 wherein the actuator comprises a linear actuator having a housing secured to the fixed base and an actuator rod secured to the movable table top.
 7. A novel scanning table according to claim 1 wherein the movable patient support platform is formed out of an X-ray transparent material.
 8. A system comprising: an imaging system; and a motorized scanning table comprising: a fixed base; a movable table top comprising a first end, a second end and a longitudinal axis extending from the first end to the second end, the movable table top being movably mounted to the fixed base for permitting the movable table top to be simultaneously moved vertically along a Y-axis and horizontally along a Z-axis relative to the fixed base, wherein the Y-axis extends perpendicular to the longitudinal axis of the movable table top and the Z-axis extends parallel to the longitudinal axis of the movable table top, wherein the movable table top is movably mounted to the fixed base by a scissor mount comprising two scissor pairs, each scissor pair comprising a pair of support arms connected to one another intermediate their length by a pivot mount, and further wherein one support arm from each pair of support arms is slidably mounted to the fixed base at one end of the support arm and is slidably mounted to the movable table top at the other end of the support arm, and the other support arm from each pair of support arms is pivotally mounted to the fixed base at one end of the support arm and is pivotally mounted to the movable table top at the other end of the support arm; and a movable patient support platform movably mounted to the movable table top for permitting the movable patient support platform to be moved horizontally along the Z-axis relative to the movable table top.
 9. A system according to claim 8 wherein one support arm from each pair of support arms is slidably mounted to the fixed base at one end of the support arm via a first linear guide which is disposed between that support arm and the fixed base, and is slidably mounted to the movable table top at the other end of that support arm via a second linear guide which is disposed between that support arm and the movable table top.
 10. A system according to claim 9 wherein the first linear guide comprises a rail secured to the fixed base and at least one follower which slidably rides on the rail and is secured to the support arm.
 11. A system according to claim 9 wherein the second linear guide comprises a rail secured to the movable table top and at least one follower which slidably rides on the rail and is secured to the support arm.
 12. A system according to claim 8 further comprising an actuator for moving the movable table top relative to the fixed base.
 13. A system according to claim 12 wherein the actuator comprises a linear actuator having a housing secured to the fixed base and an actuator rod secured to the movable table top.
 14. A system according to claim 8 wherein the movable patient support platform is formed out of an X-ray transparent material.
 15. A method for scanning a patient, the method comprising: providing an imaging system and providing a motorized scanning table, the motorized scanning table comprising: a fixed base; a movable table top comprises a first end, a second end and a longitudinal axis extending from the first end to the second end, the movable table top being movably mounted to the fixed base for permitting the movable table top to be simultaneously moved vertically along a Y-axis and horizontally along a Z-axis relative to the fixed base, wherein the Y-axis extends perpendicular to the longitudinal axis of the movable table top and the Z-axis extends parallel to the longitudinal axis of the movable table top, wherein the movable table top is movably mounted to the fixed base by a scissor mount comprising two scissor pairs, each scissor pair comprising a pair of support arms connected to one another intermediate their length by a pivot mount, and further wherein one support arm from each pair of support arms is slidably mounted to the fixed base at one end of the support arm and is slidably mounted to the movable table top at the other end of the support arm, and the other support arm from each pair of support arms is pivotally mounted to the fixed base at one end of the support arm and is pivotally mounted to the movable table top at the other end of the support arm; and a movable patient support platform movably mounted to the movable table top for permitting the movable patient support platform to be moved horizontally along the Z-axis relative to the movable table top; positioning the patient on the movable patient support platform; moving the movable table top relative to the fixed base so as to adjust the disposition of the patient relative to the imaging system; and moving the movable patient support platform while using the imaging system to scan the patient.
 16. A method according to claim 15 wherein one support arm from each pair of support arms is slidably mounted to the fixed base at one end of the support arm via a first linear guide which is disposed between that support arm and the fixed base, and is slidably mounted to the movable table top at the other end of that support arm via a second linear guide which is disposed between that support arm and the movable table top.
 17. A method according to claim 16 wherein the first linear guide comprises a rail secured to the fixed base and at least one follower which slidably rides on the rail and is secured to the support arm.
 18. A method according to claim 16 wherein the second linear guide comprises a rail secured to the movable table top and at least one follower which slidably rides on the rail and is secured to the support arm.
 19. A method according to claim 15 further comprising an actuator for moving the movable table top relative to the fixed base.
 20. A method according to claim 19 wherein the actuator comprises a linear actuator having a housing secured to the fixed base and an actuator rod secured to the movable table top.
 21. A method according to claim 15 wherein the movable patient support platform is formed out of an X-ray transparent material. 